121 models in the K series, 34–39 mm bore. Every row links to the full specification page and to the cross-reference page of that model.
K series bearings follow the ISO dimension plan for this family, so a given number is dimensionally interchangeable between brands - see the cross-reference to confirm. Choose the suffix for your duty: shields for dry, clean positions, contact seals for wet or dusty ones, and a larger clearance class where the fit or temperature demands it.
Other Ball Bearing Units series: E · NAU · LSE · UC · SNV · MSE · SD · SNT